*
   * @param array an array of {@code char} values, possibly empty
   * @param target a primitive {@code char} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(char[] array, char target) {
    return lastIndexOf(array, target, 0, array.length);

   *
   * @param array an array of {@code short} values, possibly empty
   * @param target a primitive {@code short} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(short[] array, short target) {

   *
   * @param array an array of {@code short} values, possibly empty
   * @param target a primitive {@code short} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(short[] array, short target) {

   *
   * @param array an array of {@code char} values, possibly empty
   * @param target a primitive {@code char} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(char[] array, char target) {
    return lastIndexOf(array, target, 0, array.length);

   * that this always returns {@code -1} when {@code target} is {@code NaN}.
   *
   * @param array an array of {@code float} values, possibly empty
   * @param target a primitive {@code float} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(float[] array, float target) {

   * that this always returns {@code -1} when {@code target} is {@code NaN}.
   *
   * @param array an array of {@code double} values, possibly empty
   * @param target a primitive {@code double} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(double[] array, double target) {

   *
   * @param array an array of {@code long} values, possibly empty
   * @param target a primitive {@code long} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(long[] array, long target) {
    return lastIndexOf(array, target, 0, array.length);

// DivModInt sets q = x / y and r = x % y.
func DivModInt(q, r, x, y *Int) {
	q.doinit()
	r.doinit()
	x.doinit()
	y.doinit()
	C.mpz_tdiv_qr(&q.i[0], &r.i[0], &x.i[0], &y.i[0])
}

// GcdInt sets d to the greatest common divisor of a and b,
// which must be positive numbers.
// If x and y are not nil, GcdInt sets x and y such that d = a*x + b*y.
// If either a or b is not positive, GcdInt sets d = x = y = 0.

   *
   * @param array an array of {@code int} values, possibly empty
   * @param target a primitive {@code int} value
   * @return the greatest index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int lastIndexOf(int[] array, int target) {
    return lastIndexOf(array, target, 0, array.length);

    for (int i = 1; i < array.length; i++) {
      int next = flip(array[i]);
      if (next < min) {
        min = next;
      }
    }
    return flip(min);
  }

  /**
   * Returns the greatest value present in {@code array}, treating values as unsigned.
   *
   * @param array a <i>nonempty</i> array of unsigned {@code int} values